Indicator obtained from multiple graphs

[Apo84]

Hi,

I have three different charts, I want to create an indicator to apply only to one of these charts.
The indicator must generate a print on the graph (or other) starting from the analysis of all three graphs and their indicators.

It's possible? A few examples?

Thanks Alberto

[NinjaTrader_ChrisL]

HI Alberto, thanks for posting.

There is support for multi instrument/timeframe scripts in the NinjaScript library. Use AddDataSeries() to add extra data series. The primary series will be the chart you run the indicator from. See here for a full guide on multi instrument/timeframe scripts. We also have a couple of strategy examples here:

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?entering_on_one_time_frame_and.htm

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?backtesting_ninjascript_strate.htm

Best regards,
-ChrisL

[Apo84]

Thanks for the answer.

Is there an example applied to indicators and not to strategies?

Thanks Alberto

[NinjaTrader_ChrisL]

Hi Alberto, see here for an indicator example:
https://ninjatrader.com/support/foru...king-something

Best regards,
-ChrisL

[Apo84]

Thanks for the answer.

namespace NinjaTrader.NinjaScript.Indicators
{
public class XXX : Indicator
{
private EMA emaEC_8;
private EMA emaEC_21;

private EMA emaAC_8;
private EMA emaAC_21;


protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
.....
}
else if (State == State.Configure)
{
AddDataSeries(BarsPeriodType.Minute, 10);
}
else if (State == State.DataLoaded)
{
emaEC_8 = EMA(BarsArray[0], 8);
emaEC_21 = EMA(BarsArray[0], 21);

emaAC_8 = EMA(BarsArray[1], 8);
emaAC_21 = EMA(BarsArray[1], 21);
}
}

protected override void OnBarUpdate()
{
if ( BarsInProgress!=0 )
return;

// ensure both series have at least X bar
if ( CurrentBars[0]<21 || CurrentBars[1]<21 )
return;

emaEC_8C[0] = emaEC_8[0];
emaEC_21C[0] = emaEC_21[0];

emaAC_8C[0] = emaAC1_8[0];
emaAC_21C[0] = emaAC1_21[0];

if (
( Closes[0][0]>emaEC_8[0] || Closes[0][0]>emaEC_21[0] )
&& ( Closes[0][0]>emaAC_8[0] || Closes[0][0]>emaAC_21[0] )
)
{ .... }


}
}
}

Questions:

1) I use:

if ( CurrentBars[0]<21 || CurrentBars[1]<21 )
return;

Is there an alternative way to use only EMA 8 and start using EMA 21 when we have 21 bars?

2) I use:

emaEC_8 = EMA(BarsArray[0], 8);
emaEC_21 = EMA(BarsArray[0], 21);

emaAC_8 = EMA(BarsArray[1], 8);
emaAC_21 = EMA(BarsArray[1], 21);

I use BarsArray[0] (or BarsArray[1]), but usually I see using Close:

SMA1 = SMA(Close, 10);

What are the differences?

3) Difference between Closes[0][0] (or Closes[1][0]) and Inputs[0][0] (or Inputs[1][0])???

Thanks Alberto

[NinjaTrader_ChrisL]

Hi Alberto, thanks for the follow up.

1. You can use EMA8 when CurrentBar is less than 21 and greater than 8, then continue to use a 21 ema after CurrentBar reaches 21.

2. BarsArray is a way of targeting the default price series of each series added to the script (Closes[0], Closes[1], etc). You can alternatively use Opens, Closes, Highs, Lows, etc.

3. Inputs can be an indicator data series input for the primary series, Closes is always going to be a price series.

Best regards,
-ChrisL

[Apo84]

Thanks Alberto